Rainfall trends in semi-arid cereal regions of Algeria

Other Title(s)

اتجاهات سقوط الأمطار في مناطق الحبوب شبه القاحلة في الجزائر

Joint Authors

Smadhi, Dalilah
Zella, Lakhdar
Amirush, Mawhub
Bashir, Hakim

Source

al-Qadisiyah Journal for Agriculture Sciences

Issue

Vol. 11, Issue 1 (30 Jun. 2021), pp.36-44, 9 p.

Publisher

University of al-Qadisiyah College of Agriculture

Publication Date

2021-06-30

Country of Publication

Iraq

No. of Pages

9

Main Subjects

Agriculture

Topics

Abstract EN

The study focuses on rainfall, number of rainy days and droughts, on an annual time step basis, over the period (1940-2019).

Each parameter is analysed by the average behavior of 1, 817 variables representative of 23 semi-arid wilayas.

The approach helps to characterise the rainfall climate of cereal-growing regions, where production and yields per hectare are unstable for decades.

The average rainfall, estimated at 423 mm, shows a cyclical evolution, reflected by a change in averages: 430, 405, 440 mm.

These averages reproduce two relatively rainy cycles (1940-1970) and (2000-2019), separated by a dry cycle (1970-2000).

The frequency of cyclical rains, however, shows that rains above 400 mm remain less dominant over 79 years.

The averages of observations decrease progressively with the increase of the quantities of rains, that is to say, percentages that do not exceed 14, 13 and 9% .

These characteristics underline interannual droughts, which fluctuate between 0.8 and -2.5, showing a progressively decreasing number of rainy days.

The results obtained do not seem to explain all the variations in cereal production and yield.

However, the correlation coefficients below 35% reflect the efficient use of rainfall during the crop growth cycle, which is subject to other production factors.

American Psychological Association (APA)

Smadhi, Dalilah& Zella, Lakhdar& Amirush, Mawhub& Bashir, Hakim. 2021. Rainfall trends in semi-arid cereal regions of Algeria. al-Qadisiyah Journal for Agriculture Sciences،Vol. 11, no. 1, pp.36-44.
https://search.emarefa.net/detail/BIM-1257325

Modern Language Association (MLA)

Smadhi, Dalilah…[et al.]. Rainfall trends in semi-arid cereal regions of Algeria. al-Qadisiyah Journal for Agriculture Sciences Vol. 11, no. 1 (2021), pp.36-44.
https://search.emarefa.net/detail/BIM-1257325

American Medical Association (AMA)

Smadhi, Dalilah& Zella, Lakhdar& Amirush, Mawhub& Bashir, Hakim. Rainfall trends in semi-arid cereal regions of Algeria. al-Qadisiyah Journal for Agriculture Sciences. 2021. Vol. 11, no. 1, pp.36-44.
https://search.emarefa.net/detail/BIM-1257325

Data Type

Journal Articles

Language

English

Notes

تم أخذ العنوان باللغة العربية من موقع المجلة

Record ID

BIM-1257325